package com.maochang.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.maochang.reggie.common.R;
import com.maochang.reggie.dto.DishDto;
import com.maochang.reggie.pojo.Category;
import com.maochang.reggie.pojo.Dish;
import com.maochang.reggie.pojo.DishFlavor;
import com.maochang.reggie.service.CategoryService;
import com.maochang.reggie.service.DishFlavorService;
import com.maochang.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    CategoryService categoryService;

    @Autowired
    RedisTemplate redisTemplate;
    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        //精确清理-某个分类下边的菜品
        String key="dish_"+dishDto.getCategoryId()+"_1";//dish_1397844391040167938_1
        redisTemplate.delete(key);
        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {

            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public  R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public  R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        //菜表--和口味表同时操作
        dishService.updateWithFlavor(dishDto);
        //清理所有菜品的缓存数据
        //Set keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);
        //精确清理-某个分类下边的菜品
        String key="dish_"+dishDto.getCategoryId()+"_1";//dish_1397844391040167938_1
        redisTemplate.delete(key);
        return R.success("修改菜品成功");
    }

    /**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */
    /**
     * @GetMapping("/list")
     *     public R<List<Dish>> list(Dish dish){
     *         //构造查询条件
     *         LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
     *         queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
     *         //添加条件，查询状态为1（起售状态）的菜品
     *         queryWrapper.eq(Dish::getStatus,1);
     *         //添加排序条件
     *         queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
     *
     *         List<Dish> list = dishService.list(queryWrapper);
     *
     *         return R.success(list);
     *     }
     */

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList_catch=new ArrayList<>();
        //先从redis中获取缓存数据

        //动态构造缓存key
        String key="dish_"+dish.getCategoryId()+"_"+dish.getStatus();//dish_1397844391040167938_1
        dishDtoList_catch= (List<DishDto>) redisTemplate.opsForValue().get(key);

        //如果存在直接返回，无需要查询数据库
        if(dishDtoList_catch!=null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList_catch);
        }

        //如果不存在，需要查询数据库，将查询到的这个菜品缓存到Redis中

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        //Dish菜品list
        List<Dish> list = dishService.list(queryWrapper);
        List<DishDto> dishDtoList=new ArrayList<>();
        dishDtoList= list.stream().map((item) -> {

            DishDto dishDto = new DishDto();
            //拷贝数据
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id

            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品id
            Long id = item.getId();
            LambdaQueryWrapper<DishFlavor> dishFlavorLambdaQueryWrapper=new LambdaQueryWrapper<>();
            dishFlavorLambdaQueryWrapper.eq(DishFlavor::getDishId,id);
            //SQL: select * from  dish_flavor where dish_id=?
            List<DishFlavor> list1 = dishFlavorService.list(dishFlavorLambdaQueryWrapper);
            dishDto.setFlavors(list1);
            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }
}
